SJE Inc.

Appliances, Electrical, and Electronics ManufacturingMinnesota, United States201-500 Employees

SJE Inc. is a Minnesota-based manufacturer in the Appliances, Electrical, and Electronics sector focused on water and wastewater control systems since 1975, founded by Steve Johnston. Headquartered in Detroit Lakes, it operates multiple locations in the United States and China and serves customers on every continent except Antarctica. The company manages a diversified brand portfolio and provides liquid level control solutions for municipalities, industrial clients, and homeowners, along with custom PCB capabilities through its SJE Rhombus brand. It has expanded through acquisitions, including Anchor Scientific, Inc., and LangeTech, broadening its footprint in water and wastewater components. The firm runs a Cloud Connected Solutions division and has added IoT leadership, with a Director of IoT Technology joining in 2026, and its icontrol SCADA solution has earned an IoT Breakthrough Award.

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